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A218425
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Hilltop maps: number of nX7 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..1 nX7 array
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1
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57, 11011, 1207525, 144597047, 17270172871, 2058493362799, 245489633250861, 29274579482710357, 3490981608801331021, 416298960473587173025, 49643559085814354624329, 5919983699927241114279393
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=3
..0..1..0..1..0..1..1....0..1..1..1..1..0..0....0..1..0..1..0..1..1
..0..0..0..1..1..1..0....0..1..1..1..1..1..0....0..1..0..0..1..1..1
..0..1..1..1..1..0..1....0..0..0..1..1..0..1....0..0..1..0..1..0..0
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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